Shows tooltip of the tab with <span class="argument">id</span>.

<div class="definition">
    tooltipShow(id, [event], [forceRefresh])
</div>

<div class="arguments">
    <table>
    <tr>
        <td>id</td>
        <td><b>string</b>, id of the toolbar item</td>
    </tr>
    <tr>
        <td>event</td>
        <td><b>DOM event</b>, event object (<i>optional</i>)</td>
    </tr>
    <tr>
        <td>forceRefresh</td>
        <td><b>boolean</b>, indicates if to force tooltip show (<i>optional</i>)</td>
    </tr>
    </table>
</div>

Returns <i>undefined</i>.

<h4>Description</h4>

The tab must exists in the <a class="method" href="w2tabs.tabs">.tabs</a> array. The tab is identified by
the <span class="property">.id</span> property.
<div style="height: 10px"></div>

If you have tabs defined in the following way:
<textarea class="javascript">
let tabs = new w2tabs({
    name: 'tabs',
    active: 'tab1',
    tabs: [
        { id: 'tab1', text: 'Tab 1', tooltip: 'Tab 1 tooltip' },
        { id: 'tab2', text: 'Tab 2', tooltip: 'Tab 2 tooltip' },
        { id: 'tab3', text: 'Tab 3', tooltip: 'Tab 3 tooltip' },
        { id: 'tab4', text: 'Tab 4', tooltip: 'Tab 4 tooltip' }
    ]
});
</textarea>

You can show tab's tooltip:
<textarea class="javascript">
w2ui.tabs.showTooltip('tab1');
</textarea>